Severity: moderate

Affected versions:

- Apache ActiveMQ Broker (org.apache.activemq:activemq-broker) 5.14.0 before 5.19.7
- Apache ActiveMQ Broker (org.apache.activemq:activemq-broker) 6.0.0 before 6.2.6
- Apache ActiveMQ (org.apache.activemq:activemq-all) 5.14.0 before 5.19.7
- Apache ActiveMQ (org.apache.activemq:activemq-all) 6.0.0 before 6.2.6
- Apache ActiveMQ All (org.apache.activemq:apache-activemq) 5.14.0 before 5.19.7
- Apache ActiveMQ All (org.apache.activemq:apache-activemq) 6.0.0 before 6.2.6

Description:

Exposure of Sensitive Information Through Metadata vulnerability in Apache ActiveMQ Broker, Apache ActiveMQ, Apache ActiveMQ All.

Brokers that are configured with a network connector with syncDurableSubs set to true, are vulnerable to an unauthenticated attacker who can receive a list of all durable topic subscriptions in the broker, including client identifiers, subscription names, topic destinations, and JMS selector expressions, by sending a BrokerInfo command. The broker incorrectly responds without first ensuring the connection is authenticated.
This issue affects Apache ActiveMQ Broker: before 5.19.7, from 6.0.0 before 6.2.6; Apache ActiveMQ: before 5.19.7, from 6.0.0 before 6.2.6; Apache ActiveMQ All: before 5.19.7, from 6.0.0 before 6.2.6.

Users are recommended to upgrade to version 6.2.6 or 5.19.7, which fixes the issue.

Credit:

Basel Khaled (finder)

References:

https://activemq.apache.org/
https://www.cve.org/CVERecord?id=CVE-2026-49270